As ballpark reference books go, none is better than this one. Most if not all of the other ballpark books take their details from this. It's the best there is.
The updated version increases the number of parks covered, which is good in a way and bad in a way. On the one hand, it increases the thoroughness substantially. On the other, many of the ballparks included are pretty obscure and will be of only minimal interest to many ballpark fans.
The greatest disappointment is that the formatting is more or less the same as the last edition, and very hard to use as a reference or even to just browse.
The book is organized by city first, then by ballpark chronologically. But there are not page breaks by ballpark or even city. This means that one entry runs right into the next, with the ballpark entry titles only slightly larger than the subheadings, and the city titles only slightly larger than that (though there is a line to separate cities). This makes it hard for the eye to understand the organization.
At a minimum, entries for the current major league parks should be given different visual treatment from parks of other categories (i.e. current minor league parks, former major league parks, Negro League parks, etc.).
Additionally, the tops of the pages only contain the title of the book, rather than showing which city or ballpark is covered on the page (like you might find in a dictionary, encyclopedia, bible or even a phone book).
There is a fine index, but this shouldn't really be necessary because of the book's rock-solid organization.
This would be a greater and more useful publication if a graphic artist were employed for page layout and visual organization, and if the paper were of a higher quality that would allow for color photos (the book contains only black and white).
Beyond this, maps (perhaps with rough diagrams superimposed for those which are gone) would be immensely helpful for determining actual locations and configurations. It can be maddening to match old street names to current maps.
But I want to make it clear that I love this book, and it makes a great (if sometimes frustrating) reference.